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HARRISON FLlNT AND GEORGE P. SMITH, C F DANBURY, CONNECTICUT.

Letters .Patent No. 80,467, dated July 28, 1868.

IMPROVEMENT IN MACHINES FOR TURNING IRREGULAR FORMS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, HAnnIsoN FLINT and GEORGE P. SMITH, of Danbury, in the county of Fareld, in the State of Connecticut, have invented a new and useful Improvement in Machines for Turning Irregular Forms; and we do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part oi' this specification, in which drawing- Figure 1 represents a longitudinal vertical section of this invention.

Figure 2 `is a plan orrtop view thereof.

Similar letters indicate corresponding parts.

This invention consists in giving to the block to be turned a motion in the direction of the spindle, to which the block is attached in such a manner that the cutter acts on the wood iu the direction of the fibre, and thereby a much smoother surface can be produced than by cutting crossways to the fibre, and at the same time the surface, as well as one end ofthe block, can be reached by the cutter, and a hat-forni, or other article of irregular formv can be turned much more accurately and smoothly than it can with machines ofthe ordinary construction, where the block to be turned is hung between two centres, and the cutter acts crossways tothe fibre of the wood.

The invention consists further in the arrangement of a swinging arm supporting thcv cutter, and the patternguide, in combination with a reciprocating carriage, forming the bearings for the spindles, to which the pattern and the block to be turned are attached in such a manner that the cutter is free to follow the motions of thc pattern-guide, while the pattern and the block to be turned revolve freely and move towards or from the cutter, Vand thereby the cutting of the block-is eilected with ease and facility.

The invention consists also in securing the pattern-guide to an adjustable arm, which can be set higher or lower by set-screws, in such a manner that by raising or depressing said pattcrn-guide, different sizes of blocks can be turned from oneand the same pattern.

The invention consists, iinall-y, in a pattern-block made by lling a hat or other article with plaster of Paris in such a manner that a pattern of the desired form or shape can be produced with ease and facility.

A represents a frame, made of wood or any other suitable material, and provided with two ways, a, on which moves tiie carriage B. This carriage forms the bearings for the spindles C C,-which are geared together by cog-wheels t b', so that they revolve with the saine velocity. i

This revolving motion of the spindles is produced bya belt, c, which extends from a drum, d, over a pulley mounted on the spindle C, and on this spindle is also mounted a cog-wheel, c, which gears in a similar cog-wheel, f, secured to the end of auscrew-rod, g, which passes through the end-piece of the carriage B, and is tapped into a lug, L, which rises from'the frame A. By these means the screw-rcd g receives a slow revolving motion, and thecarriagc receives a transversing motion on its guide-ways, in a direction parallel to the spindles C Cl.

On the screw-rod g is alsomounted a bevel-wheel, t', which gears into another bevel-wheel,j, secured tb a spindle, lc, which extends transversely through the carriage, and to which a revolving motion can be imparted by a hand-wheel, L By turning this hanclavheel, a traversing motion can be Vimparted to the carriage B on its guide-ways in either direction. The drum CZ, from which the spindles C Cl derive their motion, is mounted on a shaft, C2, which has its bearings in suitable boxes secured to the lower part of the frame A, and on which is mounted a worm-wheel, m, which gears into a worm, n, secured to the driving-shaft E. To this shaft the required motion is imparted by a belt running over a pulley, o, or by any other suitable means. l

The ends of the spindles C C project beyond the carriage B, and on the endoi` spindle C1 is mounted the pattern G, while the end of the spindle C supports the blbck H to be turned.

In the drawing we have shown our machine as used for turning hat-blocks, and in this case the patternblock maybe produced by taking a hat, cutting oii the brim, and filling4 the body of the same with plaster of Paris, or other suitable material, which will readily set and allow oi' being fastened to the spindle Cl.

The operation oi' cutting or turning the block il is elieeted by means of a cutter, I, which is mounted on van arbor, J, that has itsvbear'ngs Vin anar-m, K, and receives a rapid revolving motion by'a belt, p, extending from a pulley, g, over a. pulley, 1', as shown in the drawing.

The pulley q is mounted on a shaft, s, to 4which a revolving motion is imparted by a belt, t, extending from a pulley, u, on the driving-shaft, over a pulley, v, on the shafts. This shaft also forms the fulcrum for the arm K, so that this arm can be swung backward and forward without changing the belt p.

- To the side of the arm K is secured the pattern-guide, L,"thc connection beingrellectedby a link, w, which is adjustablehy a set-screw, x, so that the position of theguide can be regulated, and that larger and smaller blocks can be turned from the same pattern and with the same pattern-guide.

The link w is so arranged thatby depressing the saine the pattern-guide moves `in the segment of a circle, so that the same, in moving downwards, also'retreats, and consequently, by changing the position of said patternguide, the length of the block to be turned, as Well as its diameter, is changed. i

In turning a block, the carriage B is brought in such a. position that the guideL bears on the inner end of the pattern, the machine is then started, and the cutter I begins to act on the block H. Y v

'As the pattern revolves slowly, simultaneously with the block, the guide risesand' falls in accordance'with the sinuosities ofthe pattern, and by the guide the arm K rises and falls, and the block H is turned to'correspend in shape to the pattern. As the motion ofthe machine continues, the carriageB recedes slowly, andthe turning ofthe block is e'ccted in the direction ofthe spindle, to which the same is secured, and in the directicn of the fibres of the wood, and not crossways to the same, as heretofore, so that the surface becomes comparatively smooth by the action of the cutter, and requires but little labor to he finished after having been turned.

When the pattern-guide arrives at the edge of the pattern, itvgradually descends .over the tip, as the car- `riagc recedes, and the tip of the block-is turned tovcorrespond to the tip ofthe pattern.

It is obvious -that our machine can be used for turning blocks or irregular formsof various shapes, and'we rdo not wish to confine ourselves to the operation of turning hat-blocks.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The swinging arm K, carrying the cutter and pattern-guide, arranged relatively to the reciprocating.

carriage B, carrying the spindles C C', ou which the pattern and the block to b c turned are secured, operating substantially as audfor the purpose described.

2. The link w and set-screw as, for securing'v the pattern-guide L to the arm K, and for adjustment purposes, when operating substantially as described, for the purpose specified.

` l HARRlSON FLINT,

GEO. P. SMITH.

Witnesses:

HENRY T. HoYr, DAVID B. Boom. 

